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http://dx.doi.org/10.9711/KTAJ.2014.16.6.573

Performance estimation of conical picks with slim design by the linear cutting test (I): depending on attack angle variation  

Choi, Soon-Wook (Geotechnical Engineering Research Division, Korea Institute of Construction Technology)
Chang, Soo-Ho (Geotechnical Engineering Research Division, Korea Institute of Construction Technology)
Park, Young-Taek (Geotechnical Engineering Research Division, Korea Institute of Construction Technology)
Lee, Gyu-Phil (Geotechnical Engineering Research Division, Korea Institute of Construction Technology)
Publication Information
Journal of Korean Tunnelling and Underground Space Association / v.16, no.6, 2014 , pp. 573-584 More about this Journal
Abstract
In this study, the variations of cutter acting forces depending on cutting conditions were examined to obtain basic data for roadheader cutting head design. The linear cutting tests were performed in the condition of different attack angles, penetration depths, cutter spacings by using a slim conical pick for the light cutting condition. Cutter acting forces were measured by 3-directional load cell under different test conditions, and the analysis for cutting performance were carried out after calculating average values of the measured results. It is confirmed that the optimal cutting condition for the mortar specimen is the 50 degree attack angle, the cutter spacing of 12 mm, the cutting depth of 9 mm which are obtained from the analysis results. In addition, 50 degree attack angle is more effective than 45 degree attack angle to design optimal specifications of cutting head.
Keywords
Roadheader; Pick cutter; Linear cutting test; Mortar specimen; Cutter acting force; Attack angle;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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